Type-writer.



-'No. 672,523. Patented Apr. 23, I90I.

W;. R. FOX G. J. BARRETT,

TYPEWRlTEB.

(Application ed Oct. 1, 1898.! (No Model.) 5 Sheets-Sheet @im j@ No.672,523. Patented Apr. 23, |901.

- w. R. Fox & e. J. BARRETT.

'TYPE WRITER.

(Application ed Oct. 1, 1898.)

(no Model.)

' 5 sheets-snm 2.

ffm g@ Lw Patented Apr. 23, |90l.` W. R. FUX-& G. J. BARRETT.

TYPE WRITER.

{Application med oct. 1, 139841 5 Sheets-Sheet 3,

(ND Model.)

Patented Apr. 23, |901. 1w. B. Fox & a. .1. BARRETT'.

TY P E W R I T E R (Applxcation led Oct. 1, 1898.)

5 Sheets-Shut 4.

fue Model.) l

',272 Z022 7?. ax, "g5/elm JJM/gw lo. 672,523. v ,Patentd Apr. 23, mm.vw. s. rox a s. .BARRETT. Y

TYPE WRITER.

(Application med out. 1, 189s.)

(llo Model.) 5 Sheets-Sheet 5.

UNITED .STATES 4l-)ATENT OFFICE.

WILLIAM R. bFox AND GLENN .L BARRETT, or GRAND RAPIDS, MICHIGAN,

AssIeNoRs To'rIII; Fox MACHINE COMPANY, or .SAME PLAoE.-

TYPE-WRITER.

SPEGIFICATI'O forming part of Letter's Patent No. 672,528, dated April23, 1 901.

Application tiled October 1, 1898.

To aZZ when@ it mmyoonlcern:

Be it known that we, WVILLIAM R. FOX and GLENN J. BARRETT', citizens ofthe United Statesesidi'ng at Grand Rapids,Kent county,

Michigan, have invented certain new and useful Improvements inType-lvriters, of which the following is a specication.

Our invention relates to typewriters; and it is designedto improve thegeneral conto struction and operation ofthe same, the inI- provementsherein specified .relating chiefiy to the carriage. mechanism.

To this end the invention includes an escagement mechanism adapted to bereadily changed from regular to speed adjustment, the mechanism alsobeing constructed so that the carriage will be retained when pushedbackat the very mark of. graduation to which it is moved and will notslip back under the zo 'tension of the cerrage-spring the distance ofone or two graduations before being arrested.

`It also includes a lock for the printing mechanism operated when theend of a line has been reached and an adjustable device for controllingthe same.

It further includes a signaling device to` denote when the Aribbon hasbeen nnwound from the ribbon-spools.

' It also includes the several details of construction, as will behereinafter described, and particularly pointed out in the clainxsl Theinvention is illustrated in the accompanying drawings, in which- Figurel is a side elevation of the typewriter with parts in section. Fig. 2 isa. detail plan View of the escapeinent mechanism. Fig. 3 is a sectionalView thereof. Fig. Il is a detail View of a part of this mechanism.

- Fig. 5 is a plan view of the carriage. Fig. 6' 4o is a detail end viewof the carriage and a portion of the frame with parts in section. Fig..7 is a detail view of the platenshift key. Fig. 8 is a View of theinuei' side ot' the front rail ot' the carriage. Fig. 9 is a similarView 45 showing a modification of the bell-ringing mechanism. .Fig l0 isa detail view, partly in section, of the mechanism which allows theplaten to be removed bodily. Figs. .l1 and l2 are views of the lel't andright hand 5o ends of the platen, respectively. Fig. 13 is platen.

,of the plate c.

a detail view ot' they link-supports for the Serial No. 692,899. KNOmodel.)

platen. Fig. 14 is adetail of the front trackrail and the front of thecarriage. A Fig. 15 is ,a detail View of 'the means for holding down thehack ofthe carriage. Figs. 16, 17. and 18 55 are views of details.Figs.l 1H and 19a show a Inodilcation of the means for locking theprinting mechanism. Fig. 2O is a View of the semaphore mechanisxn, Fig.2l is a view of one of the ri Dbox1-spools, and Fig. 22 is a View 6o ofthe lock for holding down the platen. Fig. 23 Vis a view showing thedash-type-bar head carrying the dash-type in its relation to the Eig. 24is a detail view of the escapenIent-pawl.

The frame ofv the machine has a carriage b slidably mounted thereon,- tothe rearof which the escapement mechanism is located, which comprises adoubleface oscillating rack-bar c, mounted upon a. shaft' journnled instuds 7o projecting-frein the top .of said frame and a delent and pawlfor engaging the saine carried by the carriage. Our improvement in theescapement mechanism' relates particulerlyto the arrangement of thispawl and de 75 tent, the rackbar being oscillated as described in PatentNo. 614,943, previously granted to ns. I

To the face of the rear side d of the carringe-Eraclea flat platee issecured by snit- 8o ahlescrews, which projects beyond said frame andextends across the rack-bar c.'

Through a sleeve l0, screwed into the plate e, a pin 1l passes, whichhas a flange l2 abutting the underside of the sleeve l0, and a reducedthreaded upper portion extends above the' sleeve 10, to which a,horizontal arm g is clnmped by means of a washer and nut 11. 'lhe lowerend of the pin is provided withan enlarged head, between which and theflange 9o l2 the detent l is pivoted on said pin, this portion of thepin being arranged slightly eccentric to the part that passes throughthe sleeve. The arm g carries at its end a vertical-sleeve n, in whichaspring-pressed plunger o is held,the lower or pointed end of which isdesigned to engage either one of the oppositely-ar'anged depressions PPf in the face When the plunger is seated in the depression P, thedezent is held in roo such a .position that its engaging point isdirectly opposite the point ofthe pawlr whichis in engagement with theteeth c of the rackbar c. A spring-pressed plunger s, held in ahorizontal socket in the rear bar of the'carriage, presses the detenttoward the rack-bar until it bears against astop-pin s,depending fromthe plate e.

The pawl o is mounted upon the eccentric portion of a pin t, dependingfrom the plate e and provided with a reduced threaded stem, which passesthrough said plate and is surmounted by a nut andwasher to retain thepin in place. The rear portion of the pawl is provided with aslightly-elongated slot', through which tlie pin t passes. From theplate e to the rear of the pivot-pin ta post u depends, against which aspring-plunger o, held in a socket in the pawl 1", bears. This socketextends at an angle to the rack-bar c, andthe pressure of the springagainst the plunger tends to force the pawl both forward or in'thedirection of the feed of the carriage and into'engagement with the teethc' of the rack. To secure a ine engagement of the pawl with the teethVcvl of the rack-bar, a screw-pin wextends transversely through theformer and finds a bearing against a post as, depending. from the platee. By lthis means the movement of the pawl toward the rackbar may beregulated. vThe pawl while in engagement with the rack-bar is forced bythe carriage tension against the resistance of the plunger carriedtherebyvinto its extreme rearward position, pressing the front wall ofits elongated slot against the pivotpin t. On the depression of akey-bar the pawl is freed from the teeth c by'the rackbar rocking towardthe detent,v'vl1e`n the plun ger carried by said pawl at once forces thesame forwardA until the rear wall of the elongated slot bears againstthe pivot-pin. By reason of the camI portion on thisfpin or litseocentricity the amount of movement the` pawl may have' can be varied.On the forward rock of the rack-bar the pawl is adapted to snap forwardunder the impulse of its plun-l ger only a sufficient distance (aboutone onehundredth of an inch) to bring the engaging point thereof justpast the tooth of the rack from which it is released. The forwardmovement of the carriage is prevented on the de.

pression of the key-bar by the detent engaging a toothl of the rack c",directly opposite to the one in the rack o' from which the pawl has justbeen released. Upon the return of the key-bar the rack-bar also returns,but as the pawl has snapped ahead it cannot come back in the same toothas before. Hence the carriage must move ahead until the pawl strikes thewall of the next tooth. Under ordinary conditions the feed `ot" thecarriage does not take place until the return of 'the key-bar; but forvery rapid Writing it is nenessary to have the feed of the carriage takeplace when the key is depressed, and this is,- secured by swinging thearm g around until the plunger 0 is seated in the depression P. As thepin 11 is turned upon the swinging of the arm g, its eccentric portionis brought toward the rear, which draws -the detent rearwardly, so thatits pointl will be in the position indicated at y or with its engagingpoint to the rear of the engaging point of the pawl. With the partsin'sucha position, on the depression of a key-bar the rack-bar will berocked forwardly out of engagement with the pawl, and as thev engagingpoint of the detent is in the rearof the tooth of the rack c", directlyopposite that of the rack c from which the pawl has just been released,the carriage will spring forward until the wall of said tooth in therack c" engages said detent. The movement of the carriage brings theengaging point ofthe pawl in a position when the key is released and therack-bar returns to just engage the next tooth of the rack c', andi thecarriage steps forward only the distance permitted by the elongatedslot, which, as before stated, is very slight, being only about oneone-hundredth of 'an inch. The eccentricity of the pivot of the pa'wl 'rpermits the latter to be adjusted to increase or diminish itslongitudinal movement.`

The detent l has no movement Whatever under carriage tension in eitherof the arrangements of escapem'en't mechanism, while the pawl hasexactly the same' amount of movement in'both the reverse and ordinaryarrangement of escapement mechanism.

The infinitesimal movement of the pavvl rr longitudinally of the rackismerely -to make doubly sure the proper operation ot' the escapementmechanism, as-this will operate if the pawl has no 'movement parallelwith the rack-bar, as it is clear that unlike the ordi-` nary escapementmechanism the feed of the carriage does not depend upon the movement ofa pawl member, but upon the relative positions of the engaging points ofthe pawl and detent. It will be understood that if both the pawl fr anddetent l were fixed as to longitudinal movement and that if the engagingpoint of the pawl was when set for ordinary feed an infinitesimaldistance (say one one hundredth of an inch)'in advance ofthe engagingpoint of the detent the escapement-action would be secured. The cardinalfeature of the escapement is that the carriage feeds without carryingeither the pawl or detent along with it, and these parts act to arrestthe carriage at the end of its step. This being true, to secure areverse feed it is merely necessary to change the relative arrangementof the engaging points of the pawl and detent. It does not require theprovision or means to first lock one member o the engaging pawls, sothat when the parte are set for one escapement-action, it will performthe function ofa rigid deten.t,while the other pawi will be free, andthen to reverse this arrangement releasingthe member previously lockedand locking the previously-.free member to secure the reverse feed, aslhas been done, nor the provision of three pawis, nor the provision ofmeans for giving the rack-bar an IIO .avance irregular movement-fi. e.causing it to move' in different paths to secure dilerent carriagefeeds.

The keybars lare all fulcrurned at their vrear ends upon the edge of thevertical mem.- ber of an angular bracket 2, extending from side tosideof the frame a. Beneath the bars and `in advance ol?` theirfulcrum-points is a bar' 5, extending from side to side4 of the frame,provided with a plurality of openings, rinto whicharethreaded thevertical sockets 6, each one of which receives the end of one of theVcoil-springs. 7, oneV of which is provided forbsupporting each key-bar.By adjusting the sockets in the bar 5 the individual tensions of thesprings may be varied, so that a. uniform'touch may be secured.

The platen-carriage b has V-shaped grooves 20x 2OX in its lower face atthe front and rear,

While the rear tracky 22' has a V-sha ped groove.-

in its face and the fronttrack 22" has a dat space centrally thereof at23', Fig. 14, which allows t'he carriage tocenter itself. At 24, Fig.15, the-carriage has a depression in which the Wheel l()c Works to holdthe carriage vagainst vertical displacement. The bell-crank lever 10b,pivoted to the track-frame, supports this wheel, and au adjusting-screwd at the end of the lever serves to vary the pressure of the wheelupon'the carriage, the said adjnsting` 4screw bearing upon thetrack-frame. Atthe front the carriage is held down by projections f oneach side of the pointer, which hooks over the upper edge of thescalef', Fig. 5. y 'lhe platen-carriage is non-shit'tabl'e from front torear and the platen is adapted Ato have free movement, being supportedfor this purpose -n'pon link mechanism substantially the same A as thatdisclosed in ourapplication Serial No. 602,332. In order to limit thefront and rear shifting movement of the platen, -we provide adjustablescrew-stops 25 and 25', which are supported in lugs 25"*on the carriage.These stops strike against the bushing 26, which surrounds theplaten-shaft. In order to allow the platen to be removed readily fromits supporting mechanism, wemake the links 26', which connect the platenshaft withl the rocking arms 26"-, detachable from the said Thelinksareheld in engagement' with pins 29' on the said arms by means o .f-

alIllS.

springs 27', surrounding the platen-shaft and arranged between thefinger-wheels 27'.' and the bushings 26, which' are adapted to slide onthe platen-shaft and are connected with the links 26'. Thesupporting-link in rear of. theplateu (marked 26) is forked at l itsupper end to receive the pin 26bonthe crossbar A of the platen-frame,and the -pin and link are maintained in connection byaspring-vcatch31which is pivotally. mounted on the link 26. In order to removethe platen, the links 26', with the bushings 26, are pressed outwardly,so that theforward ends of the links are detached from the pins ontherocking arms', and the spring-catches 3l having been previouslythro'wnvback to release the the track-rail.

connection between Vthe rear links and the 'platen-frame theplaten isentirely-free to lie-lifted out of the machine. 'In replacing theplatenthe pins on the platen-.frame are simplypressed down and thespring-catches yield under pressure to allow the pins to drop 'into therecesses in the upper ends of the rear links, and the forward perforatedends of the links 26 having been aliued with the pins on the rockingarms the said links 26' pendent of the carriage and to be turned andlifted to expose the printing vin a manner similar to that described inthe aforesaid application. l

'In order to manipulate the feed-roller y', we provide a' levenx, havinga loop 33', embracingxthebar 34X of the platen-frame at one end ofV the,mach-ine and running to the opposite end, whereit is' bent up andterminates in an eye ern bracing the'oth'er end of said crossbar, sothat pressure on the arm 33X of this lever will remove 'the feed-rollbodily from the platen. The feed-roil is held'against the platen by'thespring 36 at the right-hand side of the machine, which is a'xed -spring,and

at the left-hand side of the machine by the f spring 37 encircling thecross-bar 34X, and this spring can be adjusted by a collar 38' connectedtherewith.

The marginal stop' comprises notches 39, cut iuto'the track, and' asliding plate 40',

movable on the track 22If and fixed in any desired position to covermore or less of the notches by a spring-stop held in the casing 40 andsimilauto the stop 40X. (Shown in The pawl which ,coacts with thismarginal stop-plate -and the' notches is piv- -oted at 40 to the innerside of the front rail of the carriage,and it is under tension of thespring 40"', which presses its point down upon At the opposite end ofthe track-rail ,22" the -groove22f is formed, in whichA a rack 41. isarranged to slide. The plate 4:2 covers more or less of this rack,lziccordingl to its adjustment, and this 4plate carries asmall trip'43,one end of which is adapted to be struck byfthe pawl 44:01 byihedepending end of a pawl 44X, arranged in advance' of the pawl 4g-asshown in Fig. 9, on

`the`cawiage,pwhile the vother end of the trip v43 rests on the swingingplate 45, pivoted underneath theLrack-railand supporting the arm 45',carrying the boli-hammer 46. When the trip 43 is struck by theprojection M 0f the pawl 44, pivoted to the carriage, Eig.r 8, or by thepawl,44 Fig. ,9, it will depress the swinging plate, elevatethebelgi-hammer, andA upon the .release of the trip'43 the plate,with.thebell-hammer, will drop back and strike rection. This arm is onatransverse shaft'47, yjonrnaled in the track-frame and under-tension ofthe spring 48, which holds the shaft against movement which might resultfrom the movement ofthe carriage back and forth. The

- rear end of this shaft has a lever 49, which extends upwardly andinwardly,so' that when the rack-bar ismoved and the arm 46 and rockshaft47 are operated this lever will be brought up between the stud 49' onthe rear track-rail and the escapemept-rack C. As in the applicationreferred to, this rack has oscillating movement about the center 51 inorder to effeet the escapement-act'ion, and upon raising the lever 49 infront of this rack its oscillation will be prevented and the keys andprinting mechanism will be locked against further action.

A modification of the locking mechanism is shown in Figs. 19 and 19", inwhich an arm 50 is shownas fixed to the shaft 47. This arm has anangular end which extends beneath a pivoted catch 50, pivoted in a-studprojecting from the frame. This catch normally rests to one side of anextension 52X of the arm, which is connected to the link 52" for rockingthe rack. 0n the rocking of the shaft 47, as before described, the catch50 is thrown up beneath the egtension 52X' in such a position as toprevent the down ward movement thereof,and in this manner the keys andprinting mechanism are locked.`

The pawl 44 of the carriage operates the Aalarm mechanismheforeitoperates the 'rackbar to lock the machine, and if it is desiredto vprint one or more letters in order to finish a word after the signalhas been given the operator simply presses on the pawl 44 at its tailend 5l', so that the pawl will he liftedout of action and the machinewill not be locked.

The slide or guide-plete 42 may he held rigidly in position, thespring-stud, heretoi'ore mentionedybeing adapted to t in a depression inthe scale. When the platen is lifted to expose the printing, it will besupported in this elevated position hy the links and by a pin 32, lig.13, which bears n on the upper part of the standard or post 32 of thecarriage-frame.

ln order to form a stop for the turning move-l ment of the platen whenit is elevated, `we provide a pin 6, Figs. 16, 17 and 18,0n the platen-'frame, working in a cut-away portion of the bushing 26, which surroundsthe platen-shaft and which is connected with the link 26'.'

' When the platen is eleveted,-thie pin strikes paper.

crasse -forms the stop and rest for the lplaten and holds it fromtipping forward. 'By means of this Stop the platen may he supportedinitselevated position either when the shift-key is depressed or-when it isnot. The shift-key comprises a supplemental portion carrying thefinger-disk and pivoted to the forward end of the key-lever, Figs. I and7, a connection running from said lever to the rocking arm 26", asdescribed inv the before-mentioned Patent No. 614,943. The rear e'nd ofthe snp'-,

plemental piece being forked and limited in its movement by a stop-pinc, the forward end ofthe supplemental piece has a projection o, andbyrst depressing the key-lever through the finger-key by a directdownward action on the finger-key the shifting of the platen will beedected, and then by tilting the supplemental piece by a forwardmovement of the key the projection on the supplemental piece will bepressed under the projecting ledge c'" on the frame and the platen willbe held for upper-case printing.

In Fig. 5 the double actingescapement release-arm is shown in dottedlines, which is used in connection with an underscoring-key,

the type-head of which is shown in Fig. 23. Upon the depression of thiskey the rack-bar c is rocked forwardly in the usual way to free the pawlr therefrom,which will bring the rack c' thereof into engagement withthe detent The release-arm which is pivoted to the carriage, bearsagainst a pin 60, projecting from the face of the detent,.and on tiltingthe front end of this arm away from thearriege the detent is pushed outof engagement with the rack-bar and the carriage is freed, -so thatagainst the paper on the platen, and by manipulating the lever 60' thecarriage may loe On the depression of its respecnog EEO

freely reciprocated back and forth tol draw a line longitudinally of theplaten. 'it the' platen is rocked into upper-case position when this key(the nnderscoring-key) is operated, the character ai" will be broughtegainst the By then turning the platen a vertical line will be drawn; ltwill loe understood that the lower dash character' is so arranged thatit willprint just below the ordinary line of printing. The arm 60' hasits extreme end in 1 engagement with the pawl fr, and by 'tilting i thefront end of this arm toward the carriage it will disengage the pawlfrom the rack, as described in Patent No. 614,943, granted to ns. Thedetentl has turning movement under tension of the spring-plunger s topermit it rco being pushed ont of its ordinary position when it isdesirable to entirely `release the carriage. When the -end of the lever60 'is pressed toward the carriage-frame, the pawl/r g will bedisengaged from the rack-bar, and as the detent is normally out ofengagement therewith the carriage may bemoved freely back and forth.However, when a key is depressed the rack is rocked on t of engagementwith the pawl and into( engagement with the detent, and in this positionit is held 'as long as the key is held depressed.' `VlTith the parts inthis position if the end of the lever 60 is moved away from the carriageit will press the det-ent out of engagement with therack, and the rackhaving been moved ont of the path of the pawl by the depression of a'key and being held in this position as long as the' key is depressed itwill be seenthat the carringe is free to be reciprocatedfreely'back andforth. If the' dash-'type key 'is the one depressed, 'thistypewillbepressi'ng against the platen 'andwll draw aline as thecarriage ismoved.

For holding the platen firm when drawing the carriage back and forth,.asin underscoring or in writing a vertical line, a catch ox,` Figs. 1 and22g pivoted to the inner 'face of the front rail 22', having alaterally-extending finger-piece, is provided. y This catch is providedwith a hookdesignedto engage the handle or arm a', fixed to the -frontbar of the platenframe 'and extending horizontally ,therefrom,which isused for raising the platen to inspect the work. i

AFor indicating when the end of the ribbon has been reached on either ofthe spools a semaphore a2 is provided,which is iixed to the end of ashaft d2, extending between the front and rear bars of the base-frame,at one side thereof. rihe semaphore normally rests parallel with thefront bar of the frame, to the rear of the same. At the other side -ofthe carriage a. shaft similar to the shaft d2 also extendsbetween thefront and rear bars of the frame.

Fixed centrally of each of the shafts d'2v and extendingradiallytherefrom is a double arm e, between the members of which a vertical ,Aarm o2 is centrally pivoted. The lower endof these -arms g2 are weightedto throw the upper ends thereof,'which are provided Withsmall flatlateral projections, against the central parts of the ribbon-spools onthe ribbons wound thereon.`

The core of each spool is provided with a Alongitudinal kerf c2i in itsperiphery, and

whenthe ribbon is almost completely nn- .wound from either spool therear Wall of the kerf in tl at spool will engage the lateral projectionof the arm g2, and as the spool so en gagirg the arm continues to turnin the nn' winding movement of the ribbon the arm g2 will be depressedand turn the shaftdz, which if it be the shaft carrying the semaphorewill operate the same directly, or if it be the opposite shaft -it willoperate the semaphore through an arm m2,' fixed to said shaft andconnected by a link n2 to the semaphore. A

ed to engage the end of the ribbon and hold the same to the spool. Thiscentral connection of the ribbon to the spool insnresan even pulllthereon.

As shown in Fig. l, the connection between one.

We claimble-facerack-bar, a pawl engaging one face thereof, a detentengaging the opposite face thereof held rigidly inall engagements withmeans for shifting-the relation of the engagingpoints of said pawl anddetent longitudinally of the rack-bar to permit the`ca`rriage to feedsubstantially one fiill step'on the depression of the key or one fullstop after the key is released, substantially' as described.

2. 'In combination, a frame, a carpiag'e, un-

members, a single paw] and detent carried bythe other memberenga,f.,'ing said rack to feed the carriage step by step, saidescapement members being disengaged by the operation of a key wherebysaid carriage will feed under said tension While both said dete'nt andsaid pawl are free of said rack-bar substantially a full step,substantially as described. 3. In combination, a frame, a carriage undertension, a rack-bar having its opposite 'faces toothed carried by saidframe, a single pawl engaging one face of the rack-bar and a detentengaging the opposite face thereoljl both being carried by saidcarriage, said pawl and detent being held in position independently' ofeach other and means for positioning the escapement members relativelyto each other to permit the carriage tofeed while said escapementmembers are all ont of engagement, `snbstantially as described.

4. In combination, the double-face rack-bar,

' the pawl and dctent adapted to engage therewith, an" eccentric pivotfor said detent and means for adj nsting said pivot fixed thereto andmeans for retaining the sam-e in its adjusted position, substantially asdescribed.

5. In combination the frame', the carriage, the double-face rack-barsupported from' said frame, a plate carried by the carriage extendinghorizontally across said rack-bar,'a pawl pivoted to said plate, a pinsecured to said plate having an eccentric portion, a detent pivoted onthe eccentric portion of said pin and an arm arranged above said plateand se'- cured to said pin for. adjnsting'the same, substantially asdescribed.

the double-face rack-bar supported from said/ frame, a plate carried bythe carriage extending horizontally across'said rack-bar, a pawl.pivotedto said plate, a pin. secured to said plate having an eccentricportion, a de tent jf pivoted on the eccentric portion of said pin,

pin 02, located centrally of this kerf, is adaptl. In combination, in atype-Writer, a dousaid bar as to longitudinal movement and der tension,a rack-bar carried by one of said 6. In cpmbination, the frame, thecarr.iage,.

the type-bars and the key-levers is a direct IIG ' pivot intheinadjusted positions, said means an arm secured to said pin for adjustingthe same, and means carried by said arm adapted to engage the plate tohold said arm and pivot in their adjusted positions, substantially asdescribed.

7. In combination, the frame, the carriage,

the' double-face rack-bar supported from said frame, a plate carried bythe carriage extending horizontally across said rack-bar, a pawlpivot-ed to said plate, a pin secured to said plate having an' eccentricportion, a detent pivoted on the eccentric portieri of said pin, an armsecured tofsaid pin for adjusting the same, end means carried by saidarm adapt-- ed to engage theplate to hold said arm and comprising aspring-plunger carried by said arm adapted to engage recesses' in saidplate.

8. In combination, the frame, the carriage, the rack-bar, the' plateextending from the carriage across the same, a' pawl -pivoted to saidplate on one side of said rack, a sleeve screwed in said plate pn theopposite side of the rack, a pin extending through said sleeve having ailange abutting the under side of said sleeve, an eccentric portionbelow' said -ange and an enlarged head, a datent piyct` eden saideccentric portion of the pin, a reduced portion of the pin extendingabove said sleeve; an arm rigidly secured thereto, and a spring-plan gercarried thereby adapted to eisgage a recess ,in said plate,substantially as described.

9. ln combination, a frame, a' carriage, a

rack-barcarried by one of said members, a pawl'land a dete'nt carried bythe other meinber adapted to` engage said rackhan, said pawl and detentbeing held in position independently of each other .and maintaininginall adjustments of said parts the same relativemovenient in thedirection of the carriagefeed, independent of said feed and means ier4adjusting the relative arrangement of the engaging points of said pawland deten-t to givev tent :free of said' racist, substantially as described.

l1. In combination, the frame, the carriage, the rack-bar, the platecarri@ by the carriage extending across said rack-bar, a palwlllooselypivoted to said plate, a spring-plunger carriedby said pawl and. apost-bearing for said plunger depending from saidxplate, substad' tiallyas described.

l2. lm combination, a frame, a carriage, a platen and platenjframe,means for holding erases the platen-frame to the carriage, saidmeanspermitting the platen to be raised or tilted, the arm extending from'the platen-frame, and the catch, independent of the means for securingthe platen-frameto the carriage secured to said carriage and adapted toengage l said arm t0 hold said platen from raising or tilting,substantially as described.

13. In combination'tbe frame, the rocking bar having its opposite edgestoothed, the carriage carrying a pivoted pawl and detect adapted toengage the opposite sides thereof and a pivoted release-lever adapted tobe operated to throw either the pawl or the detent out of engagementwith said bar substantially as described.

' 14. In combination, thecarriage,thc platen,

' the track-frame and roller for holding the ear- 'riage down and thelever pivoted to the trackfram'e with means for adjusting the leves. forvarying the pressure of the roller on the carriage and the carriage uponthe track-frame, substantially as described.

15. ln combination, the carriage having a depressiomthe wheel orroller,` running in said depression, aboli-crank lever carrying theroller and pivoted to the track-frame, and

means for adjusting the lever, substantially as described.

16. ln combination, the platen,the carriage, the link mechanism forsupporting the platen, comprising thev link 26 connected with theplaten-shaft and vadapted to be shifted longitudinally thereof,`andmeans for holding said link in normal' position, substantially as de-17. ln combinatiomthe platen, the carriage, the link mechanism betweenthe platen and carriage, said link mechanism comprising a link infrontand a link in rear of the platensbat, both' links being detachable topermit the removal of the'platen said. front linkesing.y held normallyin place by spring tension, substantially as described.

i8. In combination, the platen,the carriage, v

and link mechanism connecting the carriage and platen, said linkmechanism comprising a link connected with the platen-shaft and adaptedto shift-longitudinally thereof te be detached from its connection andthe spring about the platen-shaft te hold the link in normal position,substantially as described.

19. ln combination, the platemthe carriage, the link -mechanismsupporting the platen upon the carriage and comprising a linlr 26', therocking arm 26" for shifting the platen frolnupper to lower case, said.arm haring a detachable connection with the linl.` and yielding meansfoi` holding the link in normal position, substantially as described.v

20.' ln combination, the platen,tbe carriage,

the rocking arm26" for shifting the platen having a laterally-extendingpin,4 and a link 26 engaging said pin and adapted to shift'longitudinally of the platen-shaft to 'be detached from said pin,substantially as described.

IXO

2l. In combination, the platen, the carriage, the link-supportingmechanism comprising the shifting link 26' adapted to shiftlongitudinally of the platen to be detached from its connectiomthelinger-wheelon the platenshaft and the spring interposed between saidwheel and the link, substantially as described.

' 22. In combination, the platen, the feedroller, the erfassbar' of theplaten-frame and means for manipulating the feed-'roller comprising thelever having the loop 33 em- 'bracing the cross-bar of the platen-frame,

said lever having an arm extending to the opposite end of the machineand bent. up in the form of an eye and a spring encircling the cross-barof vthe platen-frame and connected with the lever said spring having acollar by which its tensionmay be regulated, substantially as described.

23. In combination the carriage,the platen, the pawl moving with theplaten, the adjustable plate on the front bar of the track-frame, thetrip carried by said plate, the swinging platepivoted to the track-framefixed as to movement longitudinally of said frame and arranged to beoperated by the trip, the lbellhammer on the swinging plate and abellsubstantially as described.

24. In combination, the carriage for the platen, the track-frame, theadjustable plate on the track at the front of the machine, the trip onsaid plate, the pawl on said carriage to operate the tri p,the swingingplate adapted to be operated by the trip in the different positionsthereof, said plate being pivot-ed beneath the track-frame, thebell-hammer on the plate and the stationary bell adapted to be struckthereby, substantially as described.

25. In combination,the platen,the carriage, the track-frame, the lockfor the printing mechanism and means for controllingsaid lock comprisinga rack-bar, a pawl on the carriage to engage the same, a guard-plate forshielding more or less ofthe rack-baz" from the pawl and connectionsfrom the rack-bar to the lock, substantially as described.

26. In com binatiomthe platen,the carriage, escapement mechanismincluding a swinging rack-bar, and means for locking said rack includinga pawl on the carriage, a slidable rack adapted to be engaged by saidpawl and connections interposed between the slidable rack and saidswinging rack-bar, substantiall y as described.

27. In combi nation,the calria&1 3,the platen, the track-frame, theadjustable plate on the track-frame carrying the signal-dog, connectionstherefrom to the alarm, the rack-bar, the lock for the printingmechanism, conn'ee tions from said rack-bar to the lock and a pnwl onthe carriage for operating the alarnilog and the rack bar, said rack-barbeing exposed more or less by the adjustable plate, substantially asdescribed.

28. In com bination, the frame, the carriage,

the printing mechanism, the erscapement mechanism including a swinging`rack-bar, means for checking said bar to prevent the swinging thereof, apawl carried by said carriage, a slidable rack adapted to be engagedthereby, a rock-shaft-carrying said checking device and an arm carriedby said rock-shaft, extending in the .path of said slidable rack,

fsu bstantially as described.

2). In combination the platen ,the carriage the supporting-links for theplaten adapted.

to permit the elevation of the same to expose the printing and a fixedsupporting-standard 32b on the Vcarriage adapted to be engaged by thepin 32 on the supporting-link, said pin being to one side of the axis ofthe platen to snpport'the platen in its elevated position, substantiallyas described. v

30. In combination, The platemthe carriage, the link mechanism adaptedto permit the turning of the platen and its elevation to expose theprinting and a stop consisting of a pin on the platen-frame and thebushing on the platen-shaft having a cut-away portion form ingshoulders,substantially as described.

3l. In combination,the platen,theearriage, the link mechanism connectingsaid parts and adapted to permit the elevation and turning of theplaten, said platen turning on its axis and a stop for limiting themovement of the platen, the stop being arranged to one side of the axisof the platen, substantially as described.

32. In com bination,th e carriage, the platen,

ball-bearings, the track-frame havinga V- shaped groove at the near anda correspond ing V-shaped giloove on the front bar of the carriage and alat portion arranged centrally of the front track and cooperating withthe bail-bearings held in said grooves, substantially as described.

33. In com bination,the carriage,the platen, the track-frame, the alarm,the lock for the printing'mechanism, the pawl at the front of IIO thecarriage for etecting the action 'of the alarm and the lock, anadjustable device at the front of the carriage for controlling theaction of the pawl,the said pawl beingaccessible to the operator atthet'ront of the machine whereby it may be thrown out of action aftersounding the alarm to prevent the operation of the lock, substantiallyas described.

34:. In combination, the frame, the rocking bar having its oppositeedges toothed, the 'carriage carrying a pivoted pawl adapted to engageoneside of said bar and a pivoted detent adapted te engage the' oppositeside thereof,and a release-lever pivoted to the carriage having its endextending in between said pawlfand detent for pushing either of saidmembers out of engagement with said rack-bar, substantially asdescribed.

-35. In combination in a type-writer having an escapement mechanismincluding the rocking rack-bar, an underscoring or dash type key adaptedtooperate said rocking rackfbar,

8 @mp2s a pawl and detent to engage the seme alter Vice being adapted tobe thrown out of the nately ,and a, release-bar to act upon either pathof the looking lneohanim.

the detent or the pawl,gsubst-antia,11y as de In testimony whereof weaix our signa,- cribed. tures in presence of two witnesses. 5 36. Inooxnbinatou,the carriage, the f mme,

the platembhe escapemem mechanism,'1nean for locking said escapementmechanismagainst operation and a device pivoted to the Witnesses:

front of ,the carriage adapted to engage said GEO. K. MCMULLEN, yalocking means to operate the same, Said de- WILLIAM C. HOERTZ.

